Albert b



A.. R. CHALKEH. Locomonvf stenen; K APLICvATION FILED FEB. 24. 1919.

Patented Oct. 21, 1913i' I .I l l l l l l I llt Ililllllllmlil v paiiyling drawings, in

-a citizen of the chamber,

UNITED STATES PATENT OFFICE.

ALBEnT n. cnnnnnn, or PITTSBURGH, PENNSYLVANIA, nssroNon To LocoMoTIvn sToKEn coMPANY, A conroanTIoN or' rnNNsYLvANIA.

LooonoTivn-sroxnn.

' To'aZZ whom c't may concern Be it known that I, ALBERT R. Gasunie, i United States, and resident of Pittsbur 'h, "county'of Allegheny and State of Iennsylvania, have invente certain new and useful Improvements in Looo1notiveStokers, of which the follow' is a specification, and which are illustra in the accompanying drawings, forming a part thereof. v

The invention relates to' stoking mechanism especially adapted for use in connection with locomotives, and in which there is provided a feed or distributor tube which enters through a Wall of the {ire-box, passag around the tube being provided for the a mission of air for cooling its inner e and there being a shield plate inclosin wit the outer end of the tube and forming fire-box wall a depending air chamber.

The-object of the invention is to adapt the shield plate to the iire-box walls without requiring a special' construction. of the latter.

= The rear wall or back head of a locomotive Iirebox is hollow, forming a portion of the boiler. The two plates overv which it is formed are unitedlby stay bolts located as may be necessa for strength. The outer ends of these l ts are somewhat large and vproject a substantial distance beyond vthe face of the wall and are usually inclosed within a cap.

In the application to a boiler so constructed, of a shield plate for preventing the emission of smoke or 'flame fromr the lireboX through the air ports surrounding the feed tube, it is frequently found that the heads of some of the stay bolts, one or more, i

are in the wayA oi'4 the ilange of the plate. This invention consists infa'fs'toker mecha, nism ofthe ty e referred to' havingm shield, plate surroun ing and depending from the feed tube, and spaced apart but secured/to the back head of the boiler, and a flange iitting between the plate and the back head and with these" parts inolosing an air such flange being of pliable sheet metal in order that it may be bent to a proper oon ration to escape the heads of stay. bolts w ich may lie within the. line which it would normally occupy.

-The invention is illustrated in the accomwhich 1 gure 1 shows a detail elevation, partly in section, of the back head .of a locomotive V Speeieation o! Letters kunt.

Patented Oct. 21, 1919.

Application med February $4, 1919. ys'erial No. 278,598.

boiler with the shield plate and feed tube in position, the iiange associated with the shield being indicated in dotted lines; Fi 2 is a vertical sectional view o f the back ead and of the uel delivering portion of the Stoker mechanism to which the feed tube is attached, the shield plate being shown in side elevation; and

Fig. 3 is a sectional detail of the shield plate on the line 3 3 of Fig. 1. vThe back head of the locomotive boiler comprises the outer plate 10 and the inner Elate 11, the two plates being connected, as y means of stay bolts-12, onl one of which is shown. The feed tube t rough which fuel is discharged into the lire-box of the ,locomotive is s own at 13 and sets loosel through a suitable aperture in the back hea leaving spaces or ports, as 14, 15, for the admission of air for keeping the inner end of the tube cool. .,f

This feed or a part 16 of the fuel delivering mechanism by means of a' hook bolt 17. A shield plate 18 lits upon the outer end of the tube 13, and extends a considerable distance below the same. This plate is spaced apart from the back head wall 10 to form therewith an air chamber,'the sides and top of which are closed by a plate 19. This latter plate is of pliable sheet metal and is bent to the proper configuration when the parts are assembled. Preferably, as shown, it is held in place by being clamped between the plate 18 and the wall 10, and is prevented from lateral displacement by means of an instanding bead ",bn the inner Vface of the plate 18. This standing flange 21, through which holes may b e drilled for accommodating bolts, as 22, 23, for securing it to the wall 10. 4 When, in properly positioning the shield plate, it is found that the' normal line of the plate 19 will encounter the head of a stay bolt; las 12, it may be bowed inwardly to escape such bolt head, as indicated in dotted lines at 24. As many of these bends or disn tortions of the plate 19 as may be Afound necessary can readily be formed without detriment to the shield as a whole.

Air induction ports are provided at the \lower end of the shield. In the construction hewn one such port 95v is inthe form of Va slot across the lower end of the plate' 18,

distribuer tube is Secured to 1 st-named plate is provided with an out- 1 10 plate.

1t plit'e Yfitting]upon an the bottom byfomitting a part of the wall plate 19.

.There is a constant iow of air into the fire-box through the ports 25, 26, and pass 's 14, 15z due not only to the stack draft but to the dlerenee in pressure between the' 'external air and the vapors within the rebox and the natural tendency of the air to in the chamber nclosed by the shield tube and bein I icured .to the reox wa l, and a plate of pliable sheet metal interposed edgewise between the plate and wall and with such ele :n ments inclosing an air chamber open at the bottom.

2. The combination with a fire-box having a studded apertured wall, and a feed tube extending through the aperture, of a shield comprising an apertured plate fitting upon andv dependin from the tube and bemg spaced apart om and secured to the firebox wall and having an instanding bead on its inner face adjacent its margins, and a plate of pliable sheet metal interposed between the plate and wall.

3. The `combination with a iire-box having an a ertured wall 'and a feed tube ttin loose through the aperture, of a chambere ,shiel fitting upon the outer end of the tube and dependlng therefrom, and having an air port at its lower end, the marginal walls of the shield being formed of a strip of pliable sheet metalinterposed between the front wall of the shield and the fire-box wall.

ALBERT R. CHLKER. 

